What is the primary purpose of wearing a helmet while riding a motorcycle?

Answer: B — To protect against head injuries

Wearing a helmet while riding a motorcycle fundamentally serves the crucial purpose of protecting against head injuries. Helmets are designed to absorb the impact energy during a crash, significantly reducing the risk of severe brain injuries and fatalities. In the event of an accident, wearing a properly fitted helmet can be the decisive factor in preventing life-threatening damage. While helmets may have other benefits, such as meeting legal requirements or reducing wind noise, their primary function is safety. It is important to note that while a stylish appearance can be a consideration for some riders, it should never take precedence over the essential protective capabilities that a helmet provides. Hence, the primary concern when riding should always center around personal safety and injury prevention, which is best achieved through the use of a helmet.